Re: resume sometimes reboots or freezes Laptop, trying to debug

["Rafael J. Wysocki" <rjw@sisk.pl>]

On Sunday, 8 April 2007 02:21, Sascha Heid wrote:
> Hello List!
> 
> I have a pretty new Laptop with the following specs:
> 
> Lenovo X60T (Tablet)
> Core Duo
> SATA
> Intel GMA Videocard
> Gentoo-Linux running Kernel 2.6.20
> 
> The issue is that about 1 of 10 resumes from RAM do not work by either
> the Laptop rebooting or freezing.
> What makes it more frustrating is that it is completely unpredictable
> for me, sometimes i can resume 30 times in a row and when i start
> working on something it will crash on the next resume.
> 
> After trying different kernels and configurations im now down to a
> kernel with APIC and prefetching disabled and only 1 module in use
> (WLAN).
> I also tried both the suspend2ram that comes with the kernel and s2ram
> from suspend.sf.net, the result being the same.
> 
> I have pm-debugging and tracing enabled in the kernel but thats where im stuck.
> 
> Most of the times i get something like this:
> 
>  Magic number: 0:351:236
>  hash matches device ttyv6
> 
> with various terminals
> 
> and sometimes this
> 
>  Magic number: 0:798:378
>  hash matches drivers/base/power/resume.c:46
> 
> (no further line mentioning any device here)
> 
> To suspend the laptop i run this:
> 
> chvt 1
> echo 1 > /sys/power/pm_trace
> #/home/sascha/suspend-0.5/s2ram -f -a3
> echo mem > /sys/power/state
> setserial /dev/ttyS0 port 0x0200 irq 5 autoconfig
> chvt 7
> 
> I found 1 other Linux-user with a X60T that has the same (or more)
> suspend/resume issues using standard ubuntu and suse configurations.
> 
> If anyone has any idea or advice i would appreciate it very much.

Please try 2.6.21-rc6.  If it doesn't work, please file a bug report at bugzilla.kernel.org .

Greetings,
Rafael